664860877022 has 16 divisors (see below), whose sum is σ = 1049800277760. Its totient is φ = 314928115992.

The previous prime is 664860877007. The next prime is 664860877027. The reversal of 664860877022 is 220778068466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664860877027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2357963 + ... + 2624825.

It is an arithmetic number, because the mean of its divisors is an integer number (65612517360).

Almost surely, 2^664860877022 is an apocalyptic number.

664860877022 is a deficient number, since it is larger than the sum of its proper divisors (384939400738).

664860877022 is a wasteful number, since it uses less digits than its factorization.

664860877022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332447.

The product of its (nonzero) digits is 10838016, while the sum is 56.

The spelling of 664860877022 in words is "six hundred sixty-four billion, eight hundred sixty million, eight hundred seventy-seven thousand, twenty-two".